Table 5: Total and ionic chemical abundances, and ionization correction factors of Sextans A and Sextans B H II regions, computed with the ICF method.
HKS3 HKS7 HKS9 HKS14 SHK1 SHK2 SHK5

He⁺/H⁺ $\times$ 10² 5.0 $\pm$ 1.0 7.8 $\pm$ 1.2 3.0 $\pm$ 0.5 - - 12.3 $\pm$ 2. 3.5 $\pm$ 1.0

He⁺⁺/H⁺ $\times$ 10² 0.09 $\pm$ 0.01 0.09 $\pm$ 0.01 0.09 $\pm$ 0.01 0.3 $\pm$ 0.1 0.09 $\pm$ 0.01 0.08 $\pm$ 0.01 0.5 $\pm$ 0.2

He/H $\times$ 10² 5.1 $\pm$ 1.0 7.9 $\pm$ 1.2 3.1 $\pm$ 0.5 - - 12.4 $\pm$ 2. 4.0 $\pm$ 1.2

N⁺/H⁺ $\times$ 10⁷ 2.9 $\pm$ 0.4 3.3 $\pm$ 0.5 4.4 $\pm$ 0.7 2.7 $\pm$ 0.4 2.0 $\pm$ 0.3 6.0 $\pm$ 0.1 2.7 $\pm$ 0.4

ICF(N) 5.5 2.4 2.6 7.2 4.7 2.8 8.7

N/H $\times$ 10⁷ 15.7 $\pm$ 3.0 7.9 $\pm$ 2.0 12.0 $\pm$ 4.0 20. $\pm$ 7.0 9.5 $\pm$ 3.5 17. $\pm$ 5. 24. $\pm$ 8.

O⁰/H⁺ $\times$ 10⁵ - - - 0.2 $\pm$ 0.1 - - -

O⁺/H⁺ $\times$ 10⁵ 0.6 $\pm$ 0.1 0.7 $\pm$ 0.1 0.5 $\pm$ 0.1 0.6 $\pm$ 0.1 0.6 $\pm$ 0.1 1.0 $\pm$ 0.1 0.7 $\pm$ 0.1

O⁺⁺/H⁺ $\times$ 10⁵ 2.7 $\pm$ 0.9 0.8 $\pm$ 0.3 0.9 $\pm$ 0.3 3.8 $\pm$ 1.3 2.3 $\pm$ 0.8 1.8 $\pm$ 0.6 4.3 $\pm$ 1.5

ICF(O) 1.0 1.0 1.0 1.0 1.0 1.0 1.0

O/H $\times$ 10⁵ 3.3 $\pm$ 1.0 1.5 $\pm$ 0.4 1.4 $\pm$ 0.4 4.5 $\pm$ 1.5 3.0 $\pm$ 0.9 2.8 $\pm$ 0.7 5.0 $\pm$ 1.6

Ne⁺⁺/H⁺ $\times$ 10⁶ 7.0 $\pm$ 2.0 1.4 $\pm$ 0.5 2.1 $\pm$ 0.8 7.7 $\pm$ 2.7 3.5 $\pm$ 1.3 7.5 $\pm$ 2.7 8.1 $\pm$ 2.9

ICF(Ne) 1.2 1.7 1.7 1.2 1.3 1.6 1.2

Ne/H $\times$ 10⁵ 9.0 $\pm$ 5.0 2.4 $\pm$ 1.3 3.5 $\pm$ 1.9 8.9 $\pm$ 5.0 4.4 $\pm$ 2.6 1.8 $\pm$ 0.6 9.5 $\pm$ 5.0

S⁺/H⁺ $\times$ 10⁷ 1.4 $\pm$ 0.2 1.5 $\pm$ 0.2 2.0 $\pm$ 0.3 1.6 $\pm$ 0.2 1.3 $\pm$ 0.1 3.0 $\pm$ 0.5 1.80 $\pm$ 0.2

S⁺⁺/H⁺ $\times$ 10⁷ 6.0 $\pm$ 1.0 6.0 $\pm$ 1.7 3.2 $\pm$ 0.9 3.5 $\pm$ 0.9 4.9 $\pm$ 1.2 7.5 $\pm$ 2. 6.50 $\pm$ 1.6

ICF(S) 1.3 1.1 1.1 1.4 1.25 1.1 1.5

S/H $\times$ 10⁷ 9.2 $\pm$ 2.0 8.0 $\pm$ 2.0 5.7 $\pm$ 1.3 7.2 $\pm$ 1.6 7.8 $\pm$ 1.9 11.6 $\pm$ 3. 12.2 $\pm$ 3.

Ar⁺⁺/H⁺ $\times$ 10⁷ 1.0 $\pm$ 0.3 0.7 $\pm$ 0.2 0.8 $\pm$ 0.2 0.8 $\pm$ 0.2 1.1 $\pm$ 0.3 3.2 $\pm$ 0.4 0.5 $\pm$ 0.1

ICF(Ar) 1.9 1.9 1.9 1.9 1.9 1.9 1.9

Ar/H $\times$ 10⁷ 1.9 $\pm$ 0.7 1.2 $\pm$ 0.5 1.5 $\pm$ 0.5 1.5 $\pm$ 0.5 2.1 $\pm$ 0.7 5.9 $\pm$ 2. 0.9 $\pm$ 0.3

**Table 5:** Total and ionic chemical abundances, and ionization correction factors of Sextans A and Sextans B H II regions, computed with the ICF method.
	HKS3	HKS7	HKS9	HKS14	SHK1	SHK2	SHK5
He⁺/H⁺ $\times$ 10²	5.0 $\pm$ 1.0	7.8 $\pm$ 1.2	3.0 $\pm$ 0.5	-	-	12.3 $\pm$ 2.	3.5 $\pm$ 1.0
He⁺⁺/H⁺ $\times$ 10²	0.09 $\pm$ 0.01	0.09 $\pm$ 0.01	0.09 $\pm$ 0.01	0.3 $\pm$ 0.1	0.09 $\pm$ 0.01	0.08 $\pm$ 0.01	0.5 $\pm$ 0.2
He/H $\times$ 10²	5.1 $\pm$ 1.0	7.9 $\pm$ 1.2	3.1 $\pm$ 0.5	-	-	12.4 $\pm$ 2.	4.0 $\pm$ 1.2
N⁺/H⁺ $\times$ 10⁷	2.9 $\pm$ 0.4	3.3 $\pm$ 0.5	4.4 $\pm$ 0.7	2.7 $\pm$ 0.4	2.0 $\pm$ 0.3	6.0 $\pm$ 0.1	2.7 $\pm$ 0.4
ICF(N)	5.5	2.4	2.6	7.2	4.7	2.8	8.7
N/H $\times$ 10⁷	15.7 $\pm$ 3.0	7.9 $\pm$ 2.0	12.0 $\pm$ 4.0	20. $\pm$ 7.0	9.5 $\pm$ 3.5	17. $\pm$ 5.	24. $\pm$ 8.
O⁰/H⁺ $\times$ 10⁵	-	-	-	0.2 $\pm$ 0.1	-	-	-
O⁺/H⁺ $\times$ 10⁵	0.6 $\pm$ 0.1	0.7 $\pm$ 0.1	0.5 $\pm$ 0.1	0.6 $\pm$ 0.1	0.6 $\pm$ 0.1	1.0 $\pm$ 0.1	0.7 $\pm$ 0.1
O⁺⁺/H⁺ $\times$ 10⁵	2.7 $\pm$ 0.9	0.8 $\pm$ 0.3	0.9 $\pm$ 0.3	3.8 $\pm$ 1.3	2.3 $\pm$ 0.8	1.8 $\pm$ 0.6	4.3 $\pm$ 1.5
ICF(O)	1.0	1.0	1.0	1.0	1.0	1.0	1.0
O/H $\times$ 10⁵	3.3 $\pm$ 1.0	1.5 $\pm$ 0.4	1.4 $\pm$ 0.4	4.5 $\pm$ 1.5	3.0 $\pm$ 0.9	2.8 $\pm$ 0.7	5.0 $\pm$ 1.6
Ne⁺⁺/H⁺ $\times$ 10⁶	7.0 $\pm$ 2.0	1.4 $\pm$ 0.5	2.1 $\pm$ 0.8	7.7 $\pm$ 2.7	3.5 $\pm$ 1.3	7.5 $\pm$ 2.7	8.1 $\pm$ 2.9
ICF(Ne)	1.2	1.7	1.7	1.2	1.3	1.6	1.2
Ne/H $\times$ 10⁵	9.0 $\pm$ 5.0	2.4 $\pm$ 1.3	3.5 $\pm$ 1.9	8.9 $\pm$ 5.0	4.4 $\pm$ 2.6	1.8 $\pm$ 0.6	9.5 $\pm$ 5.0
S⁺/H⁺ $\times$ 10⁷	1.4 $\pm$ 0.2	1.5 $\pm$ 0.2	2.0 $\pm$ 0.3	1.6 $\pm$ 0.2	1.3 $\pm$ 0.1	3.0 $\pm$ 0.5	1.80 $\pm$ 0.2
S⁺⁺/H⁺ $\times$ 10⁷	6.0 $\pm$ 1.0	6.0 $\pm$ 1.7	3.2 $\pm$ 0.9	3.5 $\pm$ 0.9	4.9 $\pm$ 1.2	7.5 $\pm$ 2.	6.50 $\pm$ 1.6
ICF(S)	1.3	1.1	1.1	1.4	1.25	1.1	1.5
S/H $\times$ 10⁷	9.2 $\pm$ 2.0	8.0 $\pm$ 2.0	5.7 $\pm$ 1.3	7.2 $\pm$ 1.6	7.8 $\pm$ 1.9	11.6 $\pm$ 3.	12.2 $\pm$ 3.
Ar⁺⁺/H⁺ $\times$ 10⁷	1.0 $\pm$ 0.3	0.7 $\pm$ 0.2	0.8 $\pm$ 0.2	0.8 $\pm$ 0.2	1.1 $\pm$ 0.3	3.2 $\pm$ 0.4	0.5 $\pm$ 0.1
ICF(Ar)	1.9	1.9	1.9	1.9	1.9	1.9	1.9
Ar/H $\times$ 10⁷	1.9 $\pm$ 0.7	1.2 $\pm$ 0.5	1.5 $\pm$ 0.5	1.5 $\pm$ 0.5	2.1 $\pm$ 0.7	5.9 $\pm$ 2.	0.9 $\pm$ 0.3

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations and data reduction
	3 Chemical abundances of planetary nebulae and H II regions
	4 The peculiar PN of Sextans A
	5 Summary
	References